spectral measure

spectral measure

[′spek·trəl ′mezh·ər]

(mathematics)

A measure on the spectrum of an operator on a Hilbert space whose values are projection operators there; spectral theorems concerning linear operators often give an integral representation of the operator in terms of these projection valued measures.

A possible explanation for conflicting results is that the individual's response is greatly influenced by the baseline cardiovascular autonomic function, thus producing large inter-subject variation in the conventional non-spectral and spectral measures of cardiovascular variability.

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